Disregarded extremely mean Republican party harangue (7)
I believe the answer is:
earbash
'harangue' is the definition.
Both the definition and answer are singular nouns.
Maybe there's an association between them I don't understand?
'disregarded extremely mean republican party' is the wordplay.
'disregarded extremely mean republican' becomes 'ear' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'party' becomes 'bash' (term for a party or celebration).
'ear'+'bash'='EARBASH'
Can you help me to learn more?
(Other definitions for earbash that I've seen before include "Talk with" , "rabbit" , "go on and on, down-under" , "Scold" .)